Clarify type annotations in convert_to_tbt functions for consistency and accuracy

Author: jgray-19

turn_by_turn/io.py

@@ -164,9 +164,9 @@ def read_tbt(file_path: str | Path, datatype: str = "lhc") -> TbtData:
 # Note: I don't specify tfs.TfsDataFrame as this inherits from pandas.DataFrame
 def convert_to_tbt(file_data: DataFrame | Line, datatype: str = "xtrack") -> TbtData:
     """
-    Convert a pandas or tfs DataFrame (MAD-NG) or a Table (XTrack) to a TbtData object.
+    Convert a pandas or tfs DataFrame (MAD-NG) or a Line (XTrack) to a TbtData object.
     Args:
-        file_data (Union[DataFrame, Table]): The data to convert.
+        file_data (Union[DataFrame, xt.Line]): The data to convert.
         datatype (str): The type of the data, either 'xtrack' or 'madng'. Defaults to 'xtrack'.
     Returns:
         TbtData: The converted TbtData object.

turn_by_turn/xtrack_line.py

@@ -91,12 +91,12 @@ def convert_to_tbt(xline: xt.Line) -> TbtData:
     monitor_pairs = [
         (name, elem)
         for name, elem in zip(xline.element_names, xline.elements)
-        if isinstance(elem, xt.ParticlesMonitor | xt.BeamPositionMonitor)
+        if isinstance(elem, xt.ParticlesMonitor)
     ]
     # Check that we have at least one monitor
     if not monitor_pairs:
         raise ValueError(
-            "No ParticlesMonitor or BeamPositionMonitor found in the Line. Please add a ParticlesMonitor or BeamPositionMonitor to the Line."
+            "No ParticlesMonitor found in the Line. Please add a ParticlesMonitor to the Line."
         )
     monitor_names, monitors = zip(*monitor_pairs)